package com.yunfei.utils;
import javax.servlet.http.HttpServletRequest;

/**
 * @title: Ip 操作工具类 
 * @author: zhengYunFei
 * @date : 2013-08-19 12:30
 */
public class IpUtils {
	/**
     *  获取请求IP地址
     * @param request 请求
     * @return IP地址
     */
    public static String getIp(HttpServletRequest request){
    	String ip = null;
        try{
        	ip = request.getHeader("X-Real-IP");
            if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
            	ip = request.getHeader("x-forwarded-for");
            }
            if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
                ip = request.getHeader("Proxy-Client-Ip");
            }
            if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
                ip = request.getHeader("WL-Proxy-Client-Ip");
            }
            if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
                ip = request.getRemoteAddr();
            }
            if("0:0:0:0:0:0:0:1".equals(ip)){
                ip="127.0.0.1";
            }
        }catch(Exception ex){
            //BaseLog.e(IpUtils.class, "getIp 获取Ip错误", ex);
        }
        return ip;
    }
    /**
           * 获取用户真实IP地址，不使用request.getRemoteAddr()的原因是有可能用户使用了代理软件方式避免真实IP地址,
           * 可是，如果通过了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP值
           *
           * @return ip
           */
     public static String getRealIP(HttpServletRequest request) {
                 String ip = request.getHeader("x-forwarded-for");
                if (ip != null && ip.length() != 0 && !"unknown".equalsIgnoreCase(ip)) {
                        // 多次反向代理后会有多个ip值，第一个ip才是真实ip
                         if( ip.indexOf(",")!=-1 ){
                                 ip = ip.split(",")[0];
                             }
                    }
                if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                         ip = request.getHeader("Proxy-Client-IP");
                        System.out.println("Proxy-Client-IP ip: " + ip);
                     }
                 if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                         ip = request.getHeader("WL-Proxy-Client-IP");
                         System.out.println("WL-Proxy-Client-IP ip: " + ip);
                     }
                if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                        ip = request.getHeader("HTTP_CLIENT_IP");
                        System.out.println("HTTP_CLIENT_IP ip: " + ip);
                     }
                 if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                         ip = request.getHeader("HTTP_X_FORWARDED_FOR");
                        System.out.println("HTTP_X_FORWARDED_FOR ip: " + ip);
                    }
                if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                         ip = request.getHeader("X-Real-IP");
                        System.out.println("X-Real-IP ip: " + ip);
                    }
                 if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                         ip = request.getRemoteAddr();
                         System.out.println("getRemoteAddr ip: " + ip);
                   }
                 return ip;
             }

}
